Question about 1999 Nissan Altima

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1999 Nissan Altima MAP sensor location

I am trying to replace the MAP sensor due to a P1105 code, but can't locate the sensor it is not in the repair manual.

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  • luisantafe Mar 27, 2009

    Could you install it? I have the same problem

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The MAP sensor is located on the driver's side of the engine compartment next to the air filter housing and shock tower.
It is a small plastic component with one vacuum hose coming off of it and an electrical connector that has two wires. It might be advantageous to write in and let me and/or other techs know what the symptoms are prior to replacing the sensor. Sometimes just replacing the part is a waste of money. The fact that the code has indicated the problem is the MAP sensor, doesn't mean it is bad. As an example, check to see if the Vacuum hose is secure and not disconnected or split at either end.
Good luck.

Posted on Apr 05, 2009

  • Bill Hackett Apr 10, 2009

    luisantafe: In terms of physically removing it and putting a new one on? If you can change a tire or change the light bulbs in your car, it is possible to replace this part. The primary thing is to know how to disconnect the harness from the component. Most are simply designed so that the part which plugs into the component you are replacing, has a lock. This lock, presses down at which point it released and you can pull the connector free of the component. DO NOT FORCE OR OR IT OUT! The only other factor would be to get the check engine light reset. On many OBD2 cars, they must be driven 10-20 miles for the computer to cycle if a component is replaced.

    I hope my answer is what you were seeking.

    Maybe Autozone would reset your check engine light at no charge.

    Good luck.

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Hi mybunkey. There is a part connected by the hose of the map sensor of my altima 99. Do you know the name of that part?. This part is broken.

Posted on Jul 20, 2009

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The MAP sensor is located on the driver's side of the engine compartment next to the air filter housing and shock tower.
It is a small plastic component with one vacuum hose coming off of it and an electrical connector that has two wires. . Sometimes just replacing the part is a waste of money. The fact that the code has indicated the problem is the MAP sensor, doesn't mean it is bad. As an example, check to see if the Vacuum hose is secure and not disconnected or split at either end.
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The problem is in the map sensor circuit, it could be solenoid valve. Check the vacum line that goes to the MAP sensor.

From the B14 Factory Service Manual, has a procedure for checking the MAP/BARO solenoid valve when P1105 is tripped. It is rather complex, and you will need a volt meter, but...

1- Warm up the car and pull the vacuum hose connected to the MAP/BARO switch solenoid with the engine idling. There should be vacuum there (~ -20in Hg). If NG, replace the hose.
2- Check the vacuum hose between the Absolute Pressure Sensor and the solenoid for splits/cracks and clogging (blow through it).
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